Other
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9619137s&link_type=abstract
Journal of Geophysical Research Supplement (ISSN 0148-0227), vol. 96, Oct. 30, 1991, p. 19,137-19,147.
Other
10
Absorption Spectra, Electrons, Energetic Particles, Neptune Satellites, Radiation Belts, Spectral Signatures, Electron Diffusion, Energy Spectra, Particle Diffusion, Transport Theory
Scientific paper
A simulation is developed for Neptune's trapped electrons, using electron observations by the Voyager 2 Cosmic Rays experiment and the spacecraft trajectory near the 1989N1 satellite signatures. The absorption signature is modeled by assuming that the electron losses are replenished by diffusion due to violation of the third adiabatic invariant. The macrosignature simulations showed that the depth and the shape of the counting rate signature are sensitive to the value of the radial diffusion coefficient D(LL), indicating that the observed depth and shape provide strong constraints on D(LL). It was also found that, without diffusion, the predicted microsignatures would have sharp local minima at the two orbital minimum L values of 1989N1. The observed microsignatures are closer together than the minimum orbital L shell values based on the magnetic field model. The possibility that one was formed by other orbital material cannot be ruled out.
Selesnick Richard S.
Stone Edward C.
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